Ha! too simple of a question. What do you want to do with it? The two camber profiles are very different from each other. Jones Mtn Twin is primarily camber with rockered nose and tail, Rocker/Camber/Rocker while the flying V is a conglomeration of profiles. It goes Rocker/camber/rocker/camber/rocker or something crazy like that. They will flex differently as a result and will each have a different overall feel to them. Narrow down what you want to do with the board so that people infinitely more educated than I am can help you out properly.

Both boards seem to get good reviews for all purpose riding... I live in NY so the majority of my riding is on groomed trails. But next season I'm going in search of powder. I can't afford two boards so I need something that can grip shitty ice but won't fail me when I go further afield. I'm not too bothered about parks. I like going fast

I would go for the mountain twin. I'm not the most experienced person here though. A lot of people have said they like it and can do whatever they want to and the board will perform. I'm also totally biased towards traditional camber though. Of course the burton is $385 on backcountry right now vs $425

Jones Mountain Twin has a camrock profile that personally I love (same as on my Yes Greats board) and will work in most all mountain conditions, including out west in softer snow. Jones also has mild magnetraction that will help give you better edge control on icy east coast hills. No experience with the flying V but dig around on here and you'll find plenty comments about its lack of good edge hold. Jones would get my vote.

I've come to the conclusion that people claiming this don't know glee to use there edges. I was digging trenches in some bulletproof groomers at the beginning of the year when I ride it.

That said, for the east coast and powder searching just do the Jones. Camrock has more power than RC.

Can use my edges just fine thanks been riding for 10 years have done a lot of different courses in that time and have good technique. I've owned a lot of different boards and in my opinion the flying v is a turd of a board and im not the only one that thinks that.

If you live in NY and spent a lot of times on the East Coast groomers the Jones Twin will be a better choice, hands down. It holds an edge much better than the Custom Flying V. The Flying V can also hold and edge but you really have to work for it and its not as confidence inspiring, whereas with the Jones, get on an edge and you dont need to worry about it slipping out. I've ridden both and the Jones is my choice.